The difficulty of Normal Content in this game needs to increase.

[Seraphor]

Lately, there has been a lack of (Hard) difficulty dungeons, so that would contribute to this as well.

A Realm Reborn: 10 (Hard) Dungeons
Heavensward: 5 (Hard) Dungeons
Stormblood: 2 (Hard) Dungeons
Shadowbringers: 0 (Hard) Dungeons
Endwalker: 0 (Hard) Dungeons

That's not what (Hard) Dungeons are.
They're not an increase in difficulty, they're simply revisits to previous dungeons with a new theme.